A woman has died and a man has been left seriously injured after a large tree landed on a tent they were sleeping in at a campsite west of Tokyo on early Sunday, police said.

A local fire department received a report at around 3:20 a.m. saying that a man and a woman were trapped under a tree that had fallen in Sagamihara, Kanagawa Prefecture.

According to police, the two, believed to be a married couple, were taken to hospital. But Marina Nakamura, a 29-year-old woman, was confirmed dead about two hours later.

The 31-year-old man was badly hurt and sustained serious injuries, including rib fractures, the police said, adding that the tree was about 18 meters tall with a circumference of around 70 centimeters.